Then enlighten me about the, presumably, massive difference between BlackRock and Vanguard passive funds. It must be something so huge that they are both in the

Then enlighten me about the, presumably, massive difference between BlackRock and Vanguard passive funds. It must be something so huge that they are both in the index fund/passive fund category and yet “can’t be lumped together” because it seems you’re the one who doesn’t know much.